I am happy that I found this forum. I have problem when running ems_prep (metgrid.exe). I would like to use wrfout files as inputs of an other one ( --dset wrf which uses the wrf_gribinfo.conf file) When I am running the version 3.1.1.4.26.beta I have no problem, but whit the newer versions (3.1.1.5.0 and 3.1.1.5.1) I have the following error messages:

IV. Horizontal interpolation of the intermediate files to the computational domain
EMS ERROR : In metgrid - This is not looking good!
See:
/home/wrf/wrfems/runs/probe_nmm/log/prep_metgrid.log
For more information.
! A little help from your friend
The log files from your failed run have been written to:
/home/wrf/wrfems/runs/probe_nmm/log/2010031208.metgrid_crash_logs.

At the end of the prep_metgrid.log is the error message:

At the end of the prep_metgrid.log is the error message:

INFORM: Field LANDSEA.mask does not have a valid mask and will not be checked for missing values
WRF_DEBUG: Warning DIM 4 , NAME num_metgrid_levels REDIFINED by var VV 40 39 in wrf_io.F90 ine 2424
ERROR: Error in ext_pkg_write_field

And in the prep_metgrid2.log file:
2010-03-12 09:38:30.718 --- INFORM: Field LANDSEA.mask does not have a valid mask and will not be checked for missing values
2010-03-12 09:38:30.740 --- Initializing output module.
2010-03-12 09:38:30.789 --- ERROR: Error in ext_pkg_write_field

Please tell me what is going wrong. Why the newer versions have this problem or what I am doing wrong?